# RFID card copier, 125KHz, EM4100

> Portable programmer for duplicating RFID cards and tags at 125KHz. Reads EM4100 and TK4100, writes to EM4305, T5577, CET5557, 5200, EM4205. Stores the last read card to write multiple cards consecutively without re-reading. Power supply: 3VDC, 2xAAA (not included). Lifespan >20000 operations. Dimensions: 115x70x30 mm.

- Page: https://sigmanortec.ro/en/rfid-card-copier-125khz-em4100
- Price: 44.90 RON
- Availability: In stock; 1-2 zile
- Reference: 9536 · EAN: 5948004489771
- Category: Electronic components > Access Control
- Package (shipping data): 0.101 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 05:22 (Europe/Bucharest)

## Description

Portable programmer for fast duplication of 125KHz RFID cards and tags, compatible with EM4100 and TK4100 for reading and with EM4305, T5577 and CET5557 for writing, memorizes the last card read for repeated cloning without rereading, allows consecutive writing of multiple cards, simple power supply with 2 AAA batteries for use anywhere.
Card and tag programmer 125KHz, portable, with batteries ( not included ), which allows quick duplicating of writable tags.
It allows the writing of several consecutive cards. The module will keep in memory the last card read and by pressing the "Write" button, an undefined number of cards can be written without having to read the source card.
THE READER HAS BEEN TESTED SUCCESSFULLY WITH EM4305 CARDS, READING AND WRITING PERFORMING CORRECTLY. WE DO NOT GUARANTEE THIS WILL WORK WITH ANY CARDS OTHER THAN THOSE MENTIONED IN THE SPECIFICATIONS.
WE DO NOT GUARANTEE WORKING WITH ELECTRA CARDS!
IN SOME CASES INVOLUNTARY DELETING OF SOURCE CARDS HAS BEEN REPORTED!
WE ARE NOT RESPONSIBLE FOR DELETING CARDS, WHETHER IT IS YOUR FAULT OR NOT!
Specifications:
Supply voltage: 3VDC, 2xAAA not included in the package
Reading: EM/TK cards and tags (EM4100, TK4100, etc.)
Writing: Cards and tags EM4305, CET5557, T5577, 5200, EM4205.
Read/write lifetime: >20000 operations
Compatible frequency: 125KHz
Dimensions mm: 115 x 70 x 30
Use:
- Turn on the copier from the ON/OFF switch, the Power LED flashes.
- Place the card to be read in the reading area.
- Press the "Read" button. If the reading is successful, the Read LED will flash and a beep will be heard.
- Place the card to be written in the reading area.
- Press the "Write" button and keep it pressed for 1 second until a beep is heard. When you hear the beep, the card has been written correctly.
- Adding other cards to the reading area and pressing the "Write" button will write other cards with the last read code.